Short answer: Maintenance margin is the minimum amount of equity you must keep in a perpetual futures position to avoid liquidation. It acts as a safety buffer that protects both you and the exchange from losses exceeding your deposit.
Perpetual futures are a popular way to trade cryptocurrencies with leverage, but they come with unique mechanics that can trip up new traders. One of the most critical concepts is maintenance margin — the threshold that determines whether your position gets liquidated. Understanding this number is essential for anyone who wants to trade responsibly.
Key Takeaways
- Maintenance margin is typically 0.5% to 5% of the position’s notional value, depending on the exchange and leverage used.
- When your account’s margin ratio falls below the maintenance margin level, liquidation occurs automatically.
- You can avoid liquidation by monitoring your position size, setting stop-losses, and adding more margin when needed.
What Is Maintenance Margin in Simple Terms?
Imagine you open a perpetual futures position with 10x leverage. You put down $100 as collateral, and the exchange lends you $900 to control a $1,000 position. The maintenance margin is the minimum amount of that $100 you must keep in your account to keep the trade open.
For example, if the maintenance margin requirement is 1%, you need at least $10 of your original $100 to remain in the account at all times. If your position loses value and your equity drops below $10, the exchange automatically closes the trade. This is called liquidation.
Exchanges set maintenance margin levels to protect themselves from bad debt. When a trader’s position goes underwater, the exchange needs to close it fast before losses exceed the collateral. That’s why understanding this number is non-negotiable for anyone trading perpetual futures.
For a deeper look at how leverage works, check out our guide on I Traded XRP Perpetual Futures — 5 Hard Lessons.
How Does Maintenance Margin Differ From Initial Margin?
Initial margin is what you pay to open a position. It’s the entry fee, so to speak. Maintenance margin is the ongoing requirement to keep it open. They serve different purposes.
Let’s say you want to open a $10,000 Bitcoin perpetual position with 20x leverage. Your initial margin is $500 (5% of $10,000). The exchange requires that $500 to open the trade. Once the trade is live, the maintenance margin kicks in — typically around 0.5% to 2.5% of the $10,000 position, or $50 to $250.
Here’s the key difference:
- Initial margin = the deposit required to open the position.
- Maintenance margin = the minimum equity required to keep the position open.
If your equity drops below the maintenance margin level, you get liquidated. The initial margin is gone, but you might still lose more if the liquidation process doesn’t fill at a good price.
This is a common point of confusion. Many traders think that as long as they have some money in the account, they’re fine. That’s not how it works. Once your equity hits the maintenance threshold, the exchange steps in.
How Is Maintenance Margin Calculated?
Maintenance margin is calculated as a percentage of the position’s notional value (the total size of the trade, including leverage). The exact percentage varies by exchange and by the asset you’re trading.
Here’s a typical example from major exchanges like Binance or Bybit:
| Leverage | Initial Margin | Maintenance Margin |
|---|---|---|
| 5x | 20% | 2.5% |
| 10x | 10% | 1.25% |
| 20x | 5% | 0.5% |
| 50x | 2% | 0.5% |
So if you open a $5,000 ETH position with 10x leverage, your initial margin is $500. The maintenance margin requirement is 1.25% of $5,000, which equals $62.50. If your equity drops below $62.50, liquidation happens.
But here’s the twist: the maintenance margin is not a fixed dollar amount. It changes as the position’s value changes. If the price moves against you, the notional value of the position decreases, which means the maintenance margin requirement also decreases slightly. But your equity is dropping faster.
Most exchanges calculate the margin ratio as: Margin Ratio = (Equity / Used Margin) × 100%. When that ratio hits 100% (or the maintenance margin level), you’re liquidated.
What Happens When You Hit Maintenance Margin?
When your equity falls to the maintenance margin level, the exchange initiates a liquidation. This means your position is closed automatically, and you lose your remaining collateral.
But there’s a nuance: liquidation doesn’t always happen at exactly the maintenance margin. Exchanges use a “liquidation price” that’s calculated based on the maintenance margin requirement. For example, if you’re long Bitcoin at $60,000 with 10x leverage and a 1.25% maintenance margin, your liquidation price might be around $54,500, depending on the exchange’s formula.
When liquidation occurs, the exchange sells your position at the current market price. If there’s enough liquidity, you get out at roughly the liquidation price. But if the market is moving fast, you might get a worse fill — this is called “slippage.” In extreme cases, you could end up owing money to the exchange if the liquidation price is far from the actual fill price. That’s called “negative equity” or a “liquidation deficit.”
This is why professional traders never let their positions get close to the maintenance margin level. They use stop-losses and monitor their margin ratio constantly.
For more on managing risk, read our article on Correlation Based Position Sizing in Crypto.
How Can You Avoid Getting Liquidated?
Avoiding liquidation isn’t complicated, but it requires discipline. Here are the most effective strategies:
- Use lower leverage. The higher your leverage, the closer your liquidation price is to your entry. At 50x leverage, a 2% move against you can wipe you out. At 5x leverage, you have room for a 20% move.
- Set a stop-loss. A stop-loss order closes your position at a predetermined price, well before liquidation. This gives you control over your losses.
- Add margin manually. If a trade is moving against you but you still believe in the thesis, you can add more collateral to your position. This lowers your liquidation price and gives you more breathing room.
- Monitor your margin ratio. Most exchanges show your margin ratio in real-time. Keep it well above 100% — aim for 200% to 300%.
- Use the “reduce-only” order type. If you’re worried about accidental entries, this ensures you only close positions, not open new ones.
One common mistake is thinking that liquidation is the same as losing your initial margin. Not exactly. Liquidation usually leaves you with very little equity, but you might lose the entire initial margin if the price moves fast enough.
What Most People Get Wrong
The biggest misconception about maintenance margin is that it’s a fixed number you can ignore once you open a trade. In reality, it’s a dynamic threshold that changes with price and leverage.
Another mistake is confusing maintenance margin with margin call. In traditional finance, a margin call gives you time to add funds. In crypto perpetual futures, there’s no margin call — liquidation happens instantly when you hit the maintenance level. There’s no warning, no grace period.
Some traders also assume that using higher leverage means higher maintenance margin. Actually, higher leverage often means a lower maintenance margin percentage, but the liquidation price is much closer to your entry. That’s the trade-off: lower margin requirement but less room for error.
Finally, many people think liquidation only happens when the market moves against them. But if you’re using leverage, even a small move can trigger liquidation if your position is large relative to your account balance. Position sizing matters more than most traders realize.
Key Risks and Pitfalls
Trading perpetual futures with leverage carries significant risk. Understanding maintenance margin doesn’t eliminate that risk — it just helps you manage it more effectively.
One major pitfall is “liquidation cascades.” When the market moves sharply, multiple leveraged positions get liquidated at once, causing the price to drop further. This can trigger more liquidations, creating a feedback loop. During these events, even positions with healthy margin ratios can get caught if the slippage is extreme.
Another risk is exchange-specific settings. Different exchanges calculate margin differently. Some use “cross margin,” where your entire account balance backs all open positions. Others use “isolated margin,” where only the collateral for a specific position is at risk. If you’re using cross margin, a losing position can eat into funds meant for other trades.
In addition, funding rates can erode your margin over time. Perpetual futures have periodic payments between long and short traders. If you’re on the wrong side of the funding rate, you’ll lose a small amount every few hours, which slowly reduces your equity and brings you closer to liquidation.
This content is for educational and informational purposes only and does not constitute financial advice. Trading perpetual futures involves substantial risk of loss, including the possibility of losing more than your initial deposit. Always do your own research before trading.
Our Take
From our research and analysis, we believe that maintenance margin is one of the most important concepts for any futures trader to understand. It’s not just a number on a screen — it’s the line between a controlled trade and a catastrophic loss.
We recommend that new traders start with low leverage (3x to 5x) and small position sizes until they fully understand how margin works. Use stop-losses religiously. Monitor your margin ratio like it’s the only thing that matters — because in many ways, it is.
The traders who survive and profit in this space are the ones who respect the mechanics of margin. They don’t chase high leverage. They don’t ignore liquidation prices. They treat margin management as a core skill, not an afterthought.
Sources & References
- Investopedia: Maintenance Margin
- CoinDesk: Perpetual Futures Explained
- SEC: Margin Trading Investor Bulletin
- For a complete overview, see our guide on Bittensor TAO Futures: Market Analysis for Traders.
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